Very interesting guitar dhand
You didn't mention it was a sammy (i.e. sandwich body) guitar. I haven't done any research on the guitar yet but I do have a couple of initial thoughts. First, I would bet it is 1980's. It also doesn't look 1980's Korean to me but maybe BadPenguin recognizes it.
It reminds me of a 1980's Japanese Matsumoku build in terms of neck thru and finish (see early 80's Aria Pro II) but I'll need to investigate whether Matsumoku built any sammy guitars in this period. The pickups and surrounds look primitive for the 80's. The headstock shape is a total mystery, never seen anything like it before.
You have definately introduced a real brain teaser here, glad you had pictures.
To all Forum visitors, "Let the investigation and observations begin"